CN111521031A - Control method for automatic temperature rise and drop after pneumatic valve start and stop of kiln - Google Patents
Control method for automatic temperature rise and drop after pneumatic valve start and stop of kiln Download PDFInfo
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- CN111521031A CN111521031A CN202010269982.XA CN202010269982A CN111521031A CN 111521031 A CN111521031 A CN 111521031A CN 202010269982 A CN202010269982 A CN 202010269982A CN 111521031 A CN111521031 A CN 111521031A
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- pneumatic valve
- value
- kiln
- stop
- condition
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003247 decreasing effect Effects 0.000 claims abstract description 10
- 230000001965 increasing effect Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims description 3
- 238000005496 tempering Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0081—Controlling an air-lock chamber
Abstract
The invention discloses a control method for automatic temperature rise and drop after a pneumatic valve is started and stopped in a kiln, and relates to the technical field of pneumatic valve monitoring of the kiln. The invention comprises the following steps: after the pneumatic valve of the kiln is stopped, automatically adjusting the set temperature of the temperature controller according to the pre-configured data, and closing the actuator; after the pneumatic valve of the kiln is started, the set temperature of the temperature controller is automatically adjusted to the state before the pneumatic valve stops, and the normal production of the kiln is recovered; saving the appointed SV value and setting the SV value as a preset value of a user; the SV is set to the current PV value immediately and then slowly increased or decreased to the value that is retained when the pneumatic valve is turned from start to stop. The invention monitors the switch of the kiln pneumatic valve, when the kiln pneumatic valve acts, the system lowers the set temperature to zero or a value preset by a user, the actual temperature can be quickly lowered, the probability of tempering is reduced, the protection effect is realized, and the loss caused by abnormal conditions is avoided.
Description
Technical Field
The invention belongs to the technical field of kiln pneumatic valve monitoring, and particularly relates to a control method for automatic temperature rise and drop after a kiln starts and stops a pneumatic valve.
Background
When the water gas that the kiln used is as the fuel, the pneumatic valve that the main valve used, after the kiln outage, the pneumatic means of main valve can't self-closing because the outage, and the combustion process in the kiln still continues, and the unable normal discharge of produced gas because the kiln fan outage to pressure in the kiln exceeds the pressure of gas station air feed, thereby leads to the gas pipe to produce the backfire phenomenon, and the fire in the kiln can enter into the gas pipe in promptly, and this can arouse the gas pipe explosion. To avoid this, the actuators on the gas lines need to be closed in time to prevent gas from entering the kiln. When the kiln is powered back, the actuators need to be opened again, and at the moment, if personnel go to the site to open the actuator valves on the gas pipeline one by one, the time required for opening all the actuator valves is more than ten minutes, so that the normal production of the kiln is influenced.
Disclosure of Invention
The invention aims to provide a control method for automatically increasing and decreasing the temperature after a pneumatic valve of a kiln is started and stopped, which realizes the adjustment of the temperature in the kiln by monitoring the starting and stopping states of the pneumatic valve of the kiln and solves the problems that safety accidents are easily caused by tempering in the existing kiln and all valves need to be opened when the existing kiln is re-executed.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a control method for automatic temperature rise and drop after a pneumatic valve is started and stopped for a kiln, which comprises the following steps:
step S1: a user needs to configure data of a set temperature SV and an actual temperature PV;
step S2: after the configuration is completed, the monitoring logic starts to start;
step S3: judging whether the condition of the starting and stopping conditions of the pneumatic valve is met in a circulating mode;
if the pneumatic valve is changed from the start state to the stop state, executing step S4;
if the pneumatic valve is changed from the stop state to the start state, executing the step S5;
step S4: judging whether the state condition of the pneumatic valve is changed from start to stop is satisfied;
if the condition is established, executing a condition establishment statement, saving the specified SV value and setting the SV value as a preset value of the user;
if the condition is not satisfied, continuously circulating until the condition is satisfied;
step S5: judging whether the condition that the pneumatic valve is changed from stop to start is met;
if the condition is satisfied, executing a statement that the pneumatic valve is changed from stop to start, immediately increasing or decreasing the SV value to the PV value of the current temperature controller, and slowly increasing or decreasing the SV value back to a time value that the pneumatic valve is changed from start to stop according to the preset time;
and if the condition is not met, continuously circulating and waiting for the condition that the pneumatic valve is changed from stop to start to be met.
Preferably, in step S4, after the system monitors the state of the kiln pneumatic valve, the system saves the current set value set by the user and changes the set value to the preset value of the user at a moment.
Preferably, in step S5, after the system monitors the kiln pneumatic valve for a stop/start state, the system sets the set value to the actual value immediately, and then gradually recovers to the value set by the user within the time preset by the user in a manner that the time is in a direct proportion to the set value.
Preferably, when the system monitors that the temperature returns to normal, the system will be in a locked state, and the user cannot change the set value in the locked state.
The invention has the following beneficial effects:
(1) according to the invention, by monitoring the switch of the kiln pneumatic valve after the plug-in is used, when the kiln pneumatic valve acts, the system lowers the set temperature to zero or a value preset by a user, the actual temperature can be quickly lowered, the tempering probability is reduced, the protection effect is achieved, and the loss caused by abnormal conditions is avoided.
(2) By using the system, the temperature can be automatically increased or decreased by the system, manual operation is omitted, the condition that the valves of the gas pipes are opened one by a person on site is avoided, the valves are opened for at least more than ten minutes, the temperature increasing and decreasing actions are automatically completed, manual adjustment is not needed, and the intelligent degree of the pneumatic valve of the kiln is improved.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a step diagram of a control method for automatic temperature rise and drop after a pneumatic valve is started and stopped in a kiln according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention relates to a method for controlling the automatic temperature rise and drop of a kiln after starting and stopping a pneumatic valve, comprising the following steps:
step S1: the user configures the actual temperature PV value data of the set temperature SV value in the designated file of the system;
step S2: after configuration is completed, the monitoring logic of the present invention begins to boot;
step S3: the method judges whether the condition of the starting and stopping condition of the pneumatic valve is met in a circulating mode;
if the pneumatic valve is changed from the start state to the stop state, executing step S4;
if the pneumatic valve is changed from the stop state to the start state, executing the step S5;
step S4: the method judges that the state condition of the pneumatic valve from starting to stopping is satisfied;
if the condition is established, executing a condition establishment statement, saving the specified SV value and setting the SV value as a preset value of the user;
if the condition is not satisfied, continuously circulating until the condition is satisfied;
step S5: the method judges whether the condition that the pneumatic valve is changed from stop to start is met;
if the condition is satisfied, executing a statement that the pneumatic valve is changed from stop to start, immediately increasing or decreasing the SV value to the PV value of the current temperature controller, and slowly increasing or decreasing the SV value back to a time value that the pneumatic valve is changed from start to stop according to the preset time;
because the kiln is powered up again, when the pneumatic valve is stopped and started, maintenance personnel are required to go to the site to open the valves of the gas pipe one by one, and all the valves are opened for at least more than ten minutes; after the system is used, the system can automatically raise or lower the temperature, and manual operation is omitted.
In step S4, when the system monitors that the state of the kiln pneumatic valve is turned off, the system stores the current set value set by the user and changes the set value to the preset value of the user at a moment, because the air pressure in the kiln is higher than the outside when the kiln pneumatic valve is turned off, the kiln may be back-fire, the fire in the kiln may enter the gas pipe and may cause the gas pipe to explode, after the system is used, when the kiln pneumatic valve is turned off from the on state to the off state, the system lowers the set temperature to zero or the preset value of the user, thereby driving the actuator to close, reducing or cutting off the gas entering the kiln, reducing the probability of back-fire and playing a protection role.
In step S5, when the system monitors the kiln pneumatic valve to switch from off to on, the system will first adjust the set value to the actual value, and then gradually restore the time to the value set by the user in a manner of linear relationship in direct proportion to the set value within the time set by the user.
When the system monitors that the temperature returns to normal, the system can be in a locking state, a user cannot change a set value in the locking state, the system can stop in an interface of the system at the moment, the system stops once, one of the system stops once, the rest of the system does not influence normal work, the whole process is finished, and the system automatically completes heating and cooling actions without manual adjustment.
It should be noted that, in the above system embodiment, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In addition, it is understood by those skilled in the art that all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing associated hardware, and the corresponding program may be stored in a computer-readable storage medium.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. A control method for automatic temperature rise and drop after a pneumatic valve is started and stopped for a kiln is characterized by comprising the following steps:
step S1: the user needs to configure data of set temperature (SV) and actual temperature (PV);
step S2: after the configuration is completed, the monitoring logic starts to start;
step S3: judging whether the condition of the starting and stopping conditions of the pneumatic valve is met in a circulating mode;
if the pneumatic valve is changed from the start state to the stop state, executing step S4;
if the pneumatic valve is changed from the stop state to the start state, executing the step S5;
step S4: judging whether the state condition of the pneumatic valve is changed from start to stop is satisfied;
if the condition is established, executing a condition establishment statement, saving the specified SV value and setting the SV value as a preset value of the user;
if the condition is not satisfied, continuously circulating until the condition is satisfied;
step S5: judging whether the condition that the pneumatic valve is changed from stop to start is met;
if the condition is satisfied, executing a statement that the pneumatic valve is changed from stop to start, immediately increasing or decreasing the SV value to the PV value of the current temperature controller, and slowly increasing or decreasing the SV value back to a time value that the pneumatic valve is changed from start to stop according to the preset time;
and if the condition is not met, continuously circulating and waiting for the condition that the pneumatic valve is changed from stop to start to be met.
2. The method as claimed in claim 1, wherein the system monitors the state of the furnace pneumatic valve in a start-stop state, the system saves the current set value set by the user and changes the set value to the preset value of the user at a moment in step S4.
3. The method as claimed in claim 1, wherein the system monitors the state of the kiln pneumatic valve in a stop/start state, and immediately sets the set value to an actual value, and then gradually recovers to the value set by the user in a linear relationship with a time proportional to the set value within a time preset by the user in step S5.
4. The method as claimed in claim 1, wherein the system is locked when the temperature returns to normal, and the user cannot change the set value in the locked state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269982.XA CN111521031B (en) | 2020-04-08 | 2020-04-08 | Control method for automatic temperature rise and drop after pneumatic valve start and stop of kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269982.XA CN111521031B (en) | 2020-04-08 | 2020-04-08 | Control method for automatic temperature rise and drop after pneumatic valve start and stop of kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111521031A true CN111521031A (en) | 2020-08-11 |
| CN111521031B CN111521031B (en) | 2021-08-10 |
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| CN202010269982.XA Active CN111521031B (en) | 2020-04-08 | 2020-04-08 | Control method for automatic temperature rise and drop after pneumatic valve start and stop of kiln |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10318676A (en) * | 1997-05-19 | 1998-12-04 | Shimazu Mekutemu Kk | Heat treatment furnace |
| JP2009264695A (en) * | 2008-04-28 | 2009-11-12 | Jfe Steel Corp | Sintering machine and method for operating the same |
| CN207299911U (en) * | 2017-07-21 | 2018-05-01 | 佛山市高明区新粤丰建材有限公司 | A kind of ceramic roller kiln metabolic water gas safety device |
| CN207317545U (en) * | 2017-09-07 | 2018-05-04 | 成都中光电科技有限公司 | A kind of kiln shares flue gas system |
| CN209672821U (en) * | 2019-03-11 | 2019-11-22 | 冯毅辉 | A kind of oxygenation combustion-supporting rotary kiln |
-
2020
- 2020-04-08 CN CN202010269982.XA patent/CN111521031B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10318676A (en) * | 1997-05-19 | 1998-12-04 | Shimazu Mekutemu Kk | Heat treatment furnace |
| JP2009264695A (en) * | 2008-04-28 | 2009-11-12 | Jfe Steel Corp | Sintering machine and method for operating the same |
| CN207299911U (en) * | 2017-07-21 | 2018-05-01 | 佛山市高明区新粤丰建材有限公司 | A kind of ceramic roller kiln metabolic water gas safety device |
| CN207317545U (en) * | 2017-09-07 | 2018-05-04 | 成都中光电科技有限公司 | A kind of kiln shares flue gas system |
| CN209672821U (en) * | 2019-03-11 | 2019-11-22 | 冯毅辉 | A kind of oxygenation combustion-supporting rotary kiln |
Non-Patent Citations (1)
| Title |
|---|
| 程昭华: ""关于突然停电后,再来电操作时煤气烧成窑发生防爆膜爆破的答疑"", 《佛山陶瓷》 * |
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| CN111521031B (en) | 2021-08-10 |
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Address after: 528223, Building A-2, No. 3 Xiangda Road, Danzao Town, Nanhai District, Foshan City, Guangdong Province (Residence Application) Patentee after: Guangdong Zhongpeng Thermal Energy Technology Co.,Ltd. Address before: No.1 and No.2 workshops, No.9 Panjin Road, South China hardware industrial base, Danzao Town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG JUMPER THERMAL TECHNOLOGY Co.,Ltd. |
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